Struts2在web.xml中配置后出现404错误

V0_fly 2016-10-03 02:30:43

在论坛里面查了很多关于这个错误的问题，但就是没得到解决，JSP界面单独能运行，但是要是把WEB.XML加上过滤器filter就出404错误了，检查了很多遍也找不到问题所在，请求帮助，代码如下：

web.xml:

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"

	xmlns = "http://java.sun.com/xml/ns/javaee"

	xmlns:web = "http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"

	xsi:schemaLocation = "http://java.sun.com/xml/ns/javaee

	http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"

	id = "WebApp_ID" version="3.0">

	<!-- 配置Struts2核心控制器 -->

	<filter>

  		<filter-name>struts2</filter-name>

  		<filter-class>

  			org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter

  		</filter-class>

  	</filter>

  	<filter-mapping>

  		<filter-name>struts2</filter-name>

  		<url-pattern>/*</url-pattern>

  	</filter-mapping>

</web-app>

struts.xml:

<?xml version="1.0" encoding="UTF-8"?>

<!-- Struts2配置文件的根元素 -->

<struts>

	<!-- Struts2的Action必须放在指定的包空间下定义 -->

	<package name="hello" namespace="/" extends="struts-default">

		<!-- 定义action,该,action对应的类为cn.itcast.action.HelloWorldAction类 -->

		<action name="helloWorld" class="cn.itcast.action.HelloWorldAction">

			<!-- 定义处理结果和试图资源之间的映射关系 -->

			<result name="success">/success.jsp</result>

		</action>

	</package>

</struts>

Action:

package cn.itcast.action;

import com.opensymphony.xwork2.ActionSupport;

public class HelloWorldAction extends ActionSupport{

	@Override

	public String execute() throws Exception {

		// TODO 自动生成的方法存根

		return SUCCESS;

	}

}

index.jsp:

<%@ page language="java" contentType="text/html; charset=utf-8"

    pageEncoding="utf-8"%>

<html>

	<head>

		<title>首页</title>

	</head>

	<body>

		<h1>Welcome To Struts2!</h1>

<		<a href="${pageContext.request.contextPath}/helloWorld.action">

		Hello World

		</a>

	</body>

</html>

success.jsp

<%@ page language="java" import="java.util.*" contentType="text/html; charset=utf-8"

    pageEncoding="utf-8"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

	<head>

		<title>成功页面</title>

	</head>

	<body>

	欢迎学习第一个Struts2程序！

	</body>

</html>

...全文

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_童心_ 2018-01-09

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楼主，怎么解决的？我是新手也遇到这个问题啦，急的我快疯了

liubo411215459 2017-02-15

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楼主解决了吗？我也是同样的问题

V0_fly 2016-10-10

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引用 6 楼 zhuzige521888 的回复:

1.可能版本问题 <filter> <filter-name>struts2</filter-name> <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class> </filter> <filter-mapping> <filter-name>struts2</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> 2.尝试添加参数即action所在包 <filter> <filter-name>struts2</filter-name> <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class> <init-param> <param-name>actionPackages</param-name> <param-value>com.cjm.web.action</param-value> </init-param> </filter> <filter-mapping> <filter-name>struts2</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>

回答的那么详细，虽然没解决问题。。但是也感谢您的热心指导，万分感谢

zhuzhuaicai 2016-10-09

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楼主解决了吗？

Mop.Duan 2016-10-09

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1.可能版本问题 <filter> <filter-name>struts2</filter-name> <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class> </filter> <filter-mapping> <filter-name>struts2</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> 2.尝试添加参数即action所在包 <filter> <filter-name>struts2</filter-name> <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class> <init-param> <param-name>actionPackages</param-name> <param-value>com.cjm.web.action</param-value> </init-param> </filter> <filter-mapping> <filter-name>struts2</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>

V0_fly 2016-10-09